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Car Parked in Sloped Area
Why vehicle does not move when its gear is applied though parked in slope area?
shefeerps
- Jan 22nd, 2010
In Geared Position the vehichle is connected to the piston. The gravity force on car parked in a slope is not enough to move the piston systems in the multi cylinder engines to expand or compress inside the cylinder.
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0 Degree Centigrade
Water freezes at 0 degree centigrade, Ice melts at 0 degree centigrade. How can both be true?
ajay s joshilkar
- Jan 20th, 2010
It is due to latent heat. When heat is supplied to ice at 0 d cg, this latent heat is utilised to convert the phase of ice into water without increasing the temperture and vice versa.
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Isotrphic, Isentrophic, Entrophy and Enthalphy
What is the meaning of isotrphic, isentrophic, entrophy and enthalphy?
kathi88
- Jan 14th, 2010
In general, isotropy means uniformity in all directions.For ex: we say all metals are isotropic in nature.Isentropic process is a constant entropy process.Entropy is the degree of randomness of a subs...
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Engine Coolant
Can we use the same coolant for cooling I.C. engine as well as for machining purposes? Why or why not?
vijay m
- Dec 30th, 2009
The most considerable property of coolant in viscosity which should be greater when used in Engine walls & should be lesser when used during machining operations.
shukla_vivek1011
- Sep 16th, 2009
The coolant required to use in I.C engines must posses somewhat greater viscosity as compared to the coolant used for any machine because, coolant of any machine got cooled after some periodic interval as compared to in case of any I.C engine coolant.
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DTS I Type Engines
In DTS I type engines, What will be time delay for 2nd spark produced to the 1st?
ajay s joshilkar
- Dec 27th, 2009
Both the sparks are produced at a time, therefore time between two sparks is zero.
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Vanadium in HSS
What is the use of Vanadium in High Speed Steels?
mailmisterk
- Dec 26th, 2009
Vanadium in hss forms very hard carbides and thus increases the hardness and increases the wear resistance
Manjiri ayade
- Oct 13th, 2009
Vanadium is corrosion resistant. HSS is basically used to manufacture cutting tool or machining tool which operate at faster rate. So this property of Vanadium is essential here.
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Calorific Value
What is Petrol Calorific Value?
arun govind neelan
- Dec 24th, 2009
It is defined as amount of heat energy produced when unit mass of fuel is burned1cal=4.184 joule
S.KALAIYARASAN
- Apr 21st, 2009
The calorific value of the petrol is 48,000kJ/kg.The highest calorific value fuel is hydrogen is 141,790 kJ/kg.
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ATFT Technology
What is ATFT Technology used in Honda Hunk?
vibha_v
- Nov 28th, 2009
ATFT means Advance Tumble Flow Induction Technology, Tumble flow means swirling. In this technology fuel air mixture from the carburator into the engine cylinder with a swirl action. The advantage bei...
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Air Scooper
What are the uses of air scooper?
senthil222
- Nov 25th, 2009
Its main function is to allow a direct flow of air to the engine, hence the need for it to be upraised so as to effectively channel air to the engine compartment. It may be closed, and thus purely decorative, or serve to enhance performance in several possible ways.
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Ethanol Fuel Tank
Why ethanol fuel tank is not used in automobile for increasing efficiency?
rohanmeher0287
- Nov 13th, 2009
Because in automobile we use diesel fuel and diesel fuel and ethanol are non mixing in nature. Gasoline is a octane fuel whereas diesel is a cetane fuel.
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Diesel and Petrol Engines
Why diesel engines are called as high torque engines and petrol engines as high speed engines?
Sanjana0320
- Nov 12th, 2009
As diesel engine has high compression ratio therefore it has high torque. Petrol engines have high speeds coz it produces more heat at combustion chamber because of high calorific value moreover heat ...
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Laws of Thermo Dynamics
State the laws of Thermo dynamics.
selvasuresh
- Nov 3rd, 2009
There are laws of thermodynamics1. Zeroth law2. First law of thermodynamics3. Second law of thermodynamics4. Third law of thermodynamicsZeroth laws says that energy can neither create nor be destroyed...
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Cooling Tower
How can we decide the height for cooling tower?
bhargavmech
- Oct 1st, 2009
General rules are usually used to determine cooling tower height depending on the necessary time of contact:Approach to Wet Bulb (0F) Cooling Range (0F) Tower Height (ft) ...
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Increase Boiler Efficiency
How we can increase the efficiency of boiler without creating any effort?
dneipp
- Sep 20th, 2009
Different ways, 1. use a vent damper, 2. insulate steam pipes and condensate pipes. That will not increase the efficiency of the boiler, but will save substanial energy. Make sure the boiler is tuned in properly. Make sure your steam traps are working properly.
nilesh87
- Sep 10th, 2009
Increase boiler efficiency one percent for each 15 percent reduction in excess air or 40 degree Fahrenheit reduction in flue gas.
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Inspection Equipment
What is the minimum set of inspection equipment which we have to keep at site to inspect blasting and painting?
RAVI MENON
- Sep 16th, 2009
Blasting surface profile gauge,
Wet film thickness gauge,
Dry film thickness gaugerameshm04
- Aug 15th, 2009
For measure Blasting?readings good equipment Roughness meter and for painting ELCO Meter
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DIN Standards
What are DIN Standards?
RAVI MENON
- Sep 16th, 2009
This is a German material standardDIN means DEUTSCHES INSTITUT FUR NORMUNG e.v
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Involute / Cycloidel gear
Is involute or cycloidel gear best and generally used in industry? Give Reason.
S.KALAIYARASAN
- Sep 13th, 2009
Involute gear is best when compared to cycloidel gear. Because backlash is very less.
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Alternate Propulsion Technologies
What are the propulsion technologies used in automobiles other than I.C. engines?
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Petrol and Diesel
Why are petrol and diesel are most popular among fuels used in I.C. engine?
shukla_vivek1011
- Sep 6th, 2009
Because the ignition point or the combustion point of these two fuels (fluid) are very high as compared to any other fuel, other than gas fuel.
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Bike Gear
While riding bike in 5th gear at speed around 70-80 km/hr. suppose by any means the speed decreases such as break, but keeping the gear on 5th. Engine of the bike stops. Why? Explain.
theleo
- Sep 4th, 2009
Generally in 1st and 2nd gear bike gives huge torque and less speed. But as we increase gears engine gives speed to maintain or increase speed which already bike have and give less torque. so, whe...
vivekzgoal
- Sep 2nd, 2009
Because the engine will not produce a required torque in 5th gear, so power is transmitted from wheel to engine through clutch and gear box and finally it stops the engine.
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